:root{color-scheme:dark;--ink:#eaf2ff;--muted:#8da0bd;--panel:#111a2a;--line:#26344b;--cyan:#24d7e6;--amber:#ffc247;--green:#56e39f;--danger:#ff7185;--bg:#070c14}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:radial-gradient(circle at 62% 35%,#11233a 0,#080e18 34%,#05080d 72%);color:var(--ink);font-family:"Avenir Next","Noto Sans SC","PingFang SC",sans-serif}
button,textarea,select,input{font:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.space-app{min-height:100vh}
.space-topbar{height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid #22304a;background:#080d16e8;backdrop-filter:blur(14px)}
.space-brand{display:flex;gap:12px;align-items:center;color:var(--ink);font-weight:800;text-decoration:none;letter-spacing:.04em}
.brand-cube{width:24px;height:24px;border:2px solid var(--cyan);transform:rotate(30deg) skew(-5deg);box-shadow:5px 5px 0 #24d7e633}
.space-topbar-tools,.space-topbar nav{display:flex;align-items:center}
.space-topbar-tools{gap:14px}
.space-topbar nav{gap:8px}
.space-topbar nav a{color:#b8c5d9;text-decoration:none;padding:8px 12px;border:1px solid transparent;border-radius:8px}
.space-topbar nav a:hover{color:white;border-color:#34445f;background:#111a29}
.space-current-user{display:flex;align-items:center;gap:8px;min-width:0;padding:6px 10px;border:1px solid #2b3e59;border-radius:10px;background:#0d1725;color:#d9e8fb}
.space-current-user>span:last-child{display:grid;line-height:1.15}
.space-current-user small{color:#7085a1;font-size:9px;letter-spacing:.08em}
.space-current-user strong{max-width:150px;overflow:hidden;font-size:11px;text-overflow:ellipsis;white-space:nowrap}
.user-presence{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px #56e39f18}
.space-current-user.guest .user-presence{background:#71839b;box-shadow:0 0 0 4px #71839b18}
.space-layout{display:grid;grid-template-columns:minmax(280px,340px) minmax(520px,1fr) minmax(260px,320px);gap:14px;padding:14px;min-height:calc(100vh - 66px)}
.space-input-panel,.space-stage-panel,.space-insight-panel{border:1px solid var(--line);background:linear-gradient(160deg,#121c2dF2,#0a111dF2);border-radius:18px;box-shadow:0 18px 50px #0007}
.space-input-panel,.space-insight-panel{padding:24px;overflow:auto}
.section-kicker{color:var(--cyan);font:700 11px/1.2 ui-monospace,SFMono-Regular,monospace;letter-spacing:.16em}
.space-input-panel h1{font-size:31px;line-height:1.05;margin:10px 0 12px}
.section-lead{color:var(--muted);line-height:1.65;font-size:14px}
.sample-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin:20px 0}
.sample-grid button{border:1px solid #30405d;background:#152136;color:#cfe1fa;padding:9px 5px;border-radius:9px;cursor:pointer}
.sample-grid button:hover{border-color:var(--cyan);color:white}
.space-image-input{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:-4px 0 12px;color:#7186a3;font-size:11px}
.space-image-input button{border:1px dashed #3a6380;border-radius:8px;background:#0b1b2b;color:#aeeaf0;padding:7px 10px;font:700 11px Avenir Next,system-ui;cursor:pointer}
.space-image-input button:hover{border-color:var(--cyan);background:#10263a;color:#fff}
.space-image-tray{display:flex;align-items:center;gap:9px;margin:-4px 0 13px;padding:8px;border:1px solid #2a5167;border-radius:10px;background:#091724}
.space-image-tray[hidden]{display:none}
.space-image-tray img{width:44px;height:44px;object-fit:cover;border-radius:6px;border:1px solid #3b6680}
.space-image-tray span{min-width:0;flex:1;overflow:hidden;color:#a9c5df;font-size:11px;text-overflow:ellipsis;white-space:nowrap}
.space-image-tray button{border:0;border-radius:6px;background:#22364c;color:#c7d8e8;padding:5px 7px;font-size:11px;cursor:pointer}
.space-image-tray button:hover{background:#9d4053;color:#fff}
.space-field{display:grid;gap:7px;margin:14px 0}
.space-field>span{font-size:13px;font-weight:700;color:#aebbd0}
.space-field textarea,.space-field select{width:100%;border:1px solid #32435f;border-radius:11px;background:#08101c;color:var(--ink);padding:12px;outline:none;resize:vertical}
.space-field textarea:focus,.space-field select:focus{border-color:var(--cyan);box-shadow:0 0 0 3px #24d7e618}
.space-generate{width:100%;border:0;border-radius:12px;background:linear-gradient(135deg,#10b9ce,#1ae2c0);color:#031117;padding:13px;display:grid;gap:2px;font-weight:900;cursor:pointer;box-shadow:0 10px 26px #10c9d32b}
.space-generate small{font-size:10px;font-weight:700;opacity:.65}
.space-generate:disabled{filter:grayscale(1);opacity:.55}
.space-status{min-height:38px;color:var(--muted);font-size:12px;line-height:1.5}
.space-history-panel{margin-top:8px;border-top:1px solid #263a55;padding-top:12px}
.space-history-panel summary{display:flex;align-items:center;justify-content:space-between;color:#c8d8eb;font-size:12px;font-weight:800;cursor:pointer;list-style:none}
.space-history-panel summary::-webkit-details-marker{display:none}
.space-history-panel summary:before{content:"›";margin-right:7px;color:var(--cyan);font-size:17px;transform:rotate(0);transition:transform .16s ease}
.space-history-panel[open] summary:before{transform:rotate(90deg)}
.space-history-panel summary span{margin-right:auto}
.space-history-panel summary small{color:#7287a3;font-size:10px;font-weight:600}
.space-history-list{display:grid;gap:6px;margin-top:10px}
.space-history-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 8px;width:100%;padding:9px 10px;border:1px solid #283a54;border-radius:9px;background:#0b1421;color:#dce8f7;text-align:left;cursor:pointer}
.space-history-item:hover{border-color:#3c7186;background:#0e1c2c}
.space-history-item strong,.space-history-item span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.space-history-item strong{font-size:11px}
.space-history-item span{grid-column:1/-1;color:#7f93ae;font-size:10px}
.space-history-item time{color:#6e839e;font-size:9px;font-variant-numeric:tabular-nums}
.space-history-empty{padding:16px 4px 4px;color:#677b96;font-size:11px;text-align:center}
.space-history-empty[hidden]{display:none}
.space-history-clear{margin-top:9px;border:0;background:transparent;color:#7286a1;font-size:10px;cursor:pointer}
.space-history-clear:hover{color:#ff8798}
.space-stage-panel{display:grid;grid-template-rows:auto minmax(420px,1fr) auto;min-width:0;overflow:hidden}
.stage-head{display:flex;align-items:center;justify-content:space-between;padding:17px 20px;border-bottom:1px solid var(--line)}
.stage-head h2{font-size:19px;margin:5px 0 0}
.stage-head-actions,.scene-badges{display:flex;align-items:center}
.stage-head-actions{gap:9px}
.scene-badges{gap:7px}
.scene-badges span{font-size:11px;padding:6px 9px;border:1px solid #34445e;border-radius:999px;color:#b7c7dc}
.space-export-btn{border:1px solid #2d7180;border-radius:8px;background:#0d2632;color:#b9f5f4;padding:7px 10px;font-size:11px;font-weight:800;cursor:pointer}
.space-export-btn:hover{border-color:var(--cyan);background:#123542;color:#fff}
.canvas-shell{position:relative;min-height:430px;background:radial-gradient(circle at 50% 55%,#102843 0,#07111f 48%,#050a12 100%);overflow:hidden}
.canvas-shell canvas{width:100%;height:100%;display:block;touch-action:none;cursor:grab}
.canvas-shell canvas:active{cursor:grabbing}
.canvas-hint{position:absolute;right:14px;bottom:12px;color:#6f829e;font-size:11px;pointer-events:none}
.space-controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:13px 18px;border-top:1px solid var(--line);background:#0b1320}
.space-controls label{font-size:12px;color:#c0cce0;display:flex;align-items:center;gap:6px}
.space-controls input[type=checkbox]{accent-color:var(--cyan)}
.render-settings{font-size:12px;color:#95a6c5}
.render-settings summary{cursor:pointer;list-style:none}
.render-settings summary::-webkit-details-marker{display:none}
.render-settings{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.render-settings summary{display:flex;align-items:center;gap:6px;white-space:nowrap}
.render-settings summary::before{content:"▸";font-size:10px;color:#24d7e6}
.render-settings[open] summary::before{content:"▾"}
.render-settings .range-control{font-size:12px;color:#b8c9e6;display:flex;align-items:center;gap:6px;white-space:nowrap}
.zoom-control input,.surface-opacity-control input{width:90px;accent-color:var(--cyan)}
.range-control input{width:78px;accent-color:var(--cyan)}
.surface-opacity-control output{min-width:32px;color:#dce8fa;font-variant-numeric:tabular-nums}
.space-controls button{margin-left:auto;border:1px solid #40506b;background:#152033;color:#dce8fa;border-radius:8px;padding:7px 12px;cursor:pointer}
.space-insight-panel{display:flex;flex-direction:column;gap:28px}
.space-insight-panel h3{font-size:18px;margin:8px 0 14px}
.certainty-list{display:grid;gap:8px}
.certainty-item{border-left:3px solid var(--green);background:#101b2b;padding:10px 11px;border-radius:6px;font-size:12px;line-height:1.5}
.certainty-item.inferred{border-color:var(--amber)}
.certainty-item small{display:block;color:var(--muted);margin-top:3px}
.teaching-steps{margin:0;padding:0;list-style:none;counter-reset:step;display:grid;gap:10px}
.teaching-steps li{counter-increment:step;display:grid;grid-template-columns:27px 1fr;gap:8px;color:#c9d6e9;font-size:12px;line-height:1.5}
.teaching-steps li:before{content:counter(step);width:25px;height:25px;border:1px solid #2bc8d9;color:var(--cyan);border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:800}
.scene-json-panel{margin-top:auto;border-top:1px solid var(--line);padding-top:15px}
.scene-json-panel summary{cursor:pointer;color:#8fa2bd;font-size:12px}
.scene-json-panel pre{white-space:pre-wrap;word-break:break-word;max-height:260px;overflow:auto;color:#89dce5;font:10px/1.5 ui-monospace,SFMono-Regular,monospace}
.space-status.error{color:var(--danger)}
@media(max-width:1100px){.space-layout{grid-template-columns:300px 1fr}.space-insight-panel{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr}.scene-json-panel{grid-column:1/-1}}
@media(max-width:760px){.space-topbar{padding:0 14px}.space-current-user{padding:6px 8px}.space-current-user small{display:none}.space-current-user strong{max-width:72px}.space-topbar nav a:not(:first-child){display:none}.space-layout{grid-template-columns:1fr;padding:8px}.space-stage-panel{min-height:620px}.space-insight-panel{grid-template-columns:1fr}.canvas-shell{min-height:440px}.stage-head{align-items:flex-start;gap:10px}.scene-badges{display:none}}